<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>按钮</title>
    <link rel="stylesheet" href="../css/bootstrap.min.css">
</head>
<body>
<button>button</button>
<button class="btn">btn</button>
<button class="btn btn-primary btn-xs">btn-default</button>
<button class="btn btn-default btn-sm">btn-default</button>
<button class="btn btn-success">btn-success</button>
<button class="btn btn-primary btn-lg">btn-primary</button>
<button class="btn btn-info active">btn-info</button>
<button class="btn btn-warning">btn-warning</button>
<button class="btn btn-danger">btn-danger</button>
<button class="btn btn-link">btn-link</button>
<button class="btn btn-primary btn-block">btn-block</button>
<button class="btn btn-primary disabled">disabled</button>
<a class="btn btn-primary" href="http://www.imooc.com">a</a>
</body>
</html>